code: def forward(self, x):
      return self.layer(x)
  
file_path: ray/python/ray/train/examples/experiment_tracking/lightning_exp_tracking_model_dl.py
imports: import pytorch_lightning
  import torch
  import torch.nn.functional
  from torch.utils.data import DataLoader, TensorDataset
label_desc: Use image node_id 2 for calling the DummyModel obj's underlying member method code with example usage: obj.forward(x) and returns: self